Method: WebSocket#initialize

Defined in:
lib/web/web-socket-ruby/lib/web_socket.rb

#initialize(arg, params = {}) ⇒ WebSocket

Returns a new instance of WebSocket.



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# File 'lib/web/web-socket-ruby/lib/web_socket.rb', line 37

def initialize(arg, params = {})
  if params[:server] # server

    @server = params[:server]
    @socket = arg
    line = gets()
    if !line
      raise(WebSocket::Error, "Client disconnected without sending anything.")
    end
    line = line.chomp()
    if !(line =~ /\AGET (\S+) HTTP\/1.1\z/n)
      raise(WebSocket::Error, "Invalid request: #{line}")
    end
    @path = $1
    read_header()
    if @header["sec-websocket-version"]
      @web_socket_version = @header["sec-websocket-version"]
      @key3 = nil
    elsif @header["sec-websocket-key1"] && @header["sec-websocket-key2"]
      @web_socket_version = "hixie-76"
      @key3 = read(8)
    else
      @web_socket_version = "hixie-75"
      @key3 = nil
    end
    if !@server.accepted_origin?(self.origin)
      raise(WebSocket::Error,
        ("Unaccepted origin: %s (server.accepted_domains = %p)\n\n" +
          "To accept this origin, write e.g. \n" +
          "  WebSocketServer.new(..., :accepted_domains => [%p]), or\n" +
          "  WebSocketServer.new(..., :accepted_domains => [\"*\"])\n") %
        [self.origin, @server.accepted_domains, @server.origin_to_domain(self.origin)])
    end
    @handshaked = false

  else # client
    
    @web_socket_version = "hixie-76"
    uri = arg.is_a?(String) ? URI.parse(arg) : arg

    if uri.scheme == "ws"
      default_port = 80
    elsif uri.scheme = "wss"
      default_port = 443
    else
      raise(WebSocket::Error, "unsupported scheme: #{uri.scheme}")
    end

    @path = (uri.path.empty? ? "/" : uri.path) + (uri.query ? "?" + uri.query : "")
    host = uri.host + ((!uri.port || uri.port == default_port) ? "" : ":#{uri.port}")
    origin = params[:origin] || "http://#{uri.host}"
    key1 = generate_key()
    key2 = generate_key()
    key3 = generate_key3()

    socket = TCPSocket.new(uri.host, uri.port || default_port)

    if uri.scheme == "ws"
      @socket = socket
    else
      @socket = ssl_handshake(socket)
    end

    write(
      "GET #{@path} HTTP/1.1\r\n" +
      "Upgrade: WebSocket\r\n" +
      "Connection: Upgrade\r\n" +
      "Host: #{host}\r\n" +
      "Origin: #{origin}\r\n" +
      "Sec-WebSocket-Key1: #{key1}\r\n" +
      "Sec-WebSocket-Key2: #{key2}\r\n" +
      "\r\n" +
      "#{key3}")
    flush()

    line = gets().chomp()
    raise(WebSocket::Error, "bad response: #{line}") if !(line =~ /\AHTTP\/1.1 101 /n)
    read_header()
    if (@header["sec-websocket-origin"] || "").downcase() != origin.downcase()
      raise(WebSocket::Error,
        "origin doesn't match: '#{@header["sec-websocket-origin"]}' != '#{origin}'")
    end
    reply_digest = read(16)
    expected_digest = hixie_76_security_digest(key1, key2, key3)
    if reply_digest != expected_digest
      raise(WebSocket::Error,
        "security digest doesn't match: %p != %p" % [reply_digest, expected_digest])
    end
    @handshaked = true

  end
  @received = []
  @buffer = ""
  @closing_started = false
end